1.to calculate the percent by massof an element in a known compound, divide the mass of the element in one mole by the _______and multiply by 100%. A(n) _______formula represents the lowest________ratio of the elements in a compound. It can be calculated from a compond's percent composition.The ___________formula of a compound is either the same as its empirical formula
2.what is percent composition
3.what is empirical formula
4. what is molecular formula
5.what is the percent compition of the follwing:A=Cr2O3
B.Mn2P2O7
C.HgS
D.Ca(NO3)2
6.determine the empirical formula of the compound with the percent composition of 29.1%Na,40.5%S,and 30.4%O
Too many questions to one post.
Too many questions with no work shown.
1. molar mass and
empirical formula
atomic ratio
molecular formula is the same as the empirical (but you didn't finish the sentence) formula or a multiple of the empirical formula.
1. To calculate the percent by mass of an element in a known compound, divide the mass of the element in one mole by the molar mass of the compound and multiply by 100%. A(n) empirical formula represents the lowest whole-number ratio of the elements in a compound. It can be calculated from a compound's percent composition. The molecular formula of a compound is either the same as its empirical formula.
2. Percent composition refers to the percentage (by mass) of each element present in a compound. It is calculated by dividing the mass of each element in the compound by the total mass of the compound and multiplying by 100%. This calculation allows chemists to determine the relative abundance of each element in a compound.
3. The empirical formula of a compound represents the simplest, most reduced ratio of atoms of each element present in a compound. It shows the relative number of atoms of each element in a compound, without providing the specific number of atoms. The empirical formula can be calculated from the percent composition or from experimental data.
4. The molecular formula of a compound represents the actual number of atoms of each element in a molecule. It provides the specific number of atoms present in a compound. The molecular formula can be the same as the empirical formula, or it can be a multiple of it, indicating the presence of multiple empirical formula units in a molecule.
5. To determine the percent composition of a compound, you need to know the molar mass of the compound and the mass of each element present in it. For the compounds A=Cr2O3, B=Mn2P2O7, C=HgS, and D=Ca(NO3)2, you would need to calculate the molar mass of each compound and determine the mass of each element in it. Then, divide the mass of each element by the molar mass of the compound and multiply by 100% to find the percent composition.
6. To determine the empirical formula of a compound with a given percent composition, you need to convert the percent composition into moles and then find the simplest ratio of moles for each element. For the compound with the percent composition of 29.1% Na, 40.5% S, and 30.4% O, you would first assume you have 100g of the compound. Then, you would convert the mass of each element into moles using their respective molar masses. Finally, you would find the simplest ratio of moles for each element, which would give you the empirical formula.